How do you cut a 7" oval cake and how many servings does it yield (double layer)? I'm trying to figure out if I'll have enough cake for 25 ppl if i do a Noah's ark on a 7" oval (double layer) with a 4" square double on top and 4" double on top of that for the roof

thanks

Oval servings are as follows:

7" = 10 servings
10" = 25 servings
13" = 40 servings
16" = 65 servings

Hope this helps!

Perhaps this page with diagrams will help you visualize it.
http://valleycustomcakes.com/cake_cutting_guide.html

Thank you so much!!!